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6R1A was an evolutionary step forward from the 6R1, the circuitry in the 230 is an | 6R1A was an evolutionary step forward from the 6R1, the circuitry in the 230 is an | ||
evolutionary step forward from the 6R1A. The 230 does not contain any tubes or | evolutionary step forward from the 6R1A. The 230 does not contain any tubes or | ||
tunnel diodes. It makes some use of integrated circuits. | tunnel diodes. It makes some use of integrated circuits and extensive use of | ||
reed relays. | |||
<gallery> | <gallery> |